EP2664068A1 - Hochfrequenzgenerator mit geringem phasenrauschen - Google Patents
Hochfrequenzgenerator mit geringem phasenrauschenInfo
- Publication number
- EP2664068A1 EP2664068A1 EP11794488.4A EP11794488A EP2664068A1 EP 2664068 A1 EP2664068 A1 EP 2664068A1 EP 11794488 A EP11794488 A EP 11794488A EP 2664068 A1 EP2664068 A1 EP 2664068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- mixer
- locked loop
- reference frequency
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002223 garnet Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- MTRJKZUDDJZTLA-UHFFFAOYSA-N iron yttrium Chemical compound [Fe].[Y] MTRJKZUDDJZTLA-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
- H03L7/185—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using a mixer in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
- H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
- H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
- H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
- H03L2207/10—Indirect frequency synthesis using a frequency multiplier in the phase-locked loop or in the reference signal path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
- H03L2207/12—Indirect frequency synthesis using a mixer in the phase-locked loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/07—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop using several loops, e.g. for redundant clock signal generation
Definitions
- the invention relates to a high frequency signal generator.
- a frequency-variable reference signal is a frequency-variable reference signal
- DE 41 05 566 AI shows a mixer which synchronizes an oscillator in the GHz range to a clean frequency. This mixer works with one
- Multiplier diode which generates a short pulse from the reference frequency, with the line spectrum of which the signal of the oscillator is mixed.
- a disadvantage of this method is the poor signal-to-noise ratio that can be achieved with this arrangement. Since the
- High frequency generator which is a switchable
- Phase locked loop includes.
- the output signal of the oscillator is optionally fed to a frequency divider or a series connection of multiple mixers.
- the signal of the frequency divider is used.
- the signal of the series-connected mixer is switched over. Also with a signal generator according to this concept, only suboptimal phase noise can be achieved.
- the invention is based on the object, a
- the oscillator according to the invention preferably has two oscillators controlled by means of phase locked loops.
- a first phase locked loop generates a
- the comparison frequency is advantageously> 10 MHz, so that fast frequency changes are possible.
- Passive doubling stages with subsequent filtering are preferably used to realize extremely low-noise operation.
- the advantageous filters between the doubling stages suppress unwanted harmonics.
- Frequency range can be further increased.
- the resulting intermediate frequency is preferred with a digital
- Phase detector synchronized to a fraction of the reference frequency.
- the preferred use of the reference signal as an input signal to the divider ensures that no crossing mixing products are produced in the mixers.
- the mixed products are advantageously on a grid which corresponds to the last intermediate frequency divided by the resolution of the divider. By suitable choice of the divider factors, these mixed products can be chosen so that these mixed products are suppressed by the loop filter and thus no secondary lines in the
- the oscillator is advantageously pre-adjusted.
- the vote is based on an individually measured
- the high-frequency oscillator according to the invention has a reference frequency generator and a
- the reference frequency generator generates a variable reference frequency and supplies it to the high frequency generator.
- the high frequency generator has a phase locked loop and generates a high frequency signal from the variable reference frequency.
- the Phase locked loop has at least a first mixer, a second mixer and several switches. The first mixer, the second mixer and the switches are connected in series. The mixers are individually selectively switched into the phase locked loop by means of the switches. It becomes such an adjustability of
- Phase noise can be further reduced.
- Fig. 1 is a first partial view of a
- Fig. 2 is a second partial view of the
- Fig. 1 and Fig. 2 is an embodiment of the invention in two different views High frequency oscillator shown.
- Reference frequency generator 1 includes a fractional frequency divider 11, a phase detector 12, a
- the fractional frequency divider 11 is a frequency-stable reference signal of e.g.
- the fractional frequency divider 11 generates a signal having a frequency divided by N Fref and supplies it to the phase detector 12.
- the phase detector 12 compares this signal with a signal generated by the mixer 10 and outputs a corresponding one
- the reference frequency generator 1 further has a plurality of frequency doublers 15, 16, 17, 18, which double the frequency of an applied signal.
- Frequency doubler 15 - 18 is a bandpass filter 20 - 23 connected downstream, which only pass each doubled frequency and other components of the
- Bandpass filter 21 is a 4-fold reference frequency of 2.6-2.8 GHz. At the output of the bandpass filter 22 is an 8-fold reference frequency of 5.2-5.6 GHz. At the output of the bandpass filter 23 is a 16-fold
- the 2-fold reference frequency of 1.3-1.4 GHz is supplied to a fractional frequency divider 30 of the high-frequency generator 2. This divides the frequency of the signal by a division factor of N Fma i n .
- phase discriminator 31 which compares it with the signal of a phase locked loop 60 and forwards a corresponding output signal to a loop filter 32. This filters the signal and gives it to a voltage-controlled or current-controlled
- Oscillator 33 advantageously an yttrium iron garnet (YIG) oscillator on.
- YIG yttrium iron garnet
- Loop filter 32 serves to finely adjust the frequency of controlled oscillator 33.
- the controlled oscillator 33 is further supplied by a coarse control device 34, a signal for coarse adjustment of its output frequency.
- the output signal of the voltage controlled oscillator 33 is supplied via a signal divider 35 of the phase locked loop 60. It first passes through a mixer 36, from which it is mixed with the 16-fold reference frequency. The output signal of the mixer becomes a
- Low pass filter 41 supplied, which allows only the lower mixing product to pass.
- the output signal is fed to a switch 46, which optionally supplies it to a further mixer 37 or this mixer 37
- a further switch 47 is connected, which together with the switch 46, the connection of the mixer 37 or performs its bridging.
- Bandpass filter 42 is supplied, which allows only the lower mixing product of the mixer 37 pass. If the mixer 37 has been bypassed, the low pass filter 42 is irrelevant to the applied signal.
- the output signal is again supplied to a combination of two switches 48, 49 which, like the switches 46, 47, either feed the signal to another mixer 38 or bridge it. If the signal is supplied to the further mixer 38, it mixes it with four times
- Output signal is again a low-pass filter 43
- the further mixer 40 mixes with the unchanged reference frequency of
- Example 650-700 MHz The resulting signal after the low-pass filter 45 becomes the phase discriminator 31
- the signals with which the mixers 36-40 mix the signal of the phase locked loop 60 are the signals with which the mixers 36-40 mix the signal of the phase locked loop 60.
- the first mixer 36 may be provided with switches. In this case, this mixer can be bridged. Alternatively, a higher or lower number of mixers can be used in the phase locked loop. The higher the tuning range of the oscillator should be, the more mixers are used.
- Phase locked loop 60 thus includes mixers 36-40, bandpass filters 41-45, switches 46-53, phase discriminator 31, and loop filter 32.
- the starting point is an output frequency of the
- the parameter V which is the multiple of the Reference frequency f ref , with which to mix, corresponds, calculated.
- V serve the minimum adjustable reference frequency of 650 MHz in the example and a favorable for the main loop intermediate frequency of 55 MHz, for example.
- V INT (( fosz + 55 MHz) / 650 MHz)
- the reference frequency f ref is calculated.
- V is used. Since V is rounded off to integers, one results
- Reference frequency which is slightly higher than 650 MHz.
- Reference frequency generator calculated.
- the partial factor N Fref of the reference frequency generator 1 is rounded so that no secondary lines occur within the loop bandwidth .
- N Fref 640 MHz / ABS [(640 MHz - f ref )], with round to 1 / F with
- the modulation is prevented by a decimal part of less than 8 MHz and thus can be attenuated by the phase locked loop. Subsequently, the intermediate frequency f zf in the
- Phase locked loop 60 of the high frequency generator 2 calculated.
- This calculated intermediate frequency f Zf is now rounded to an adjustable value.
- N Fmain 2 * 640 MHz * (1 - 1 / N Fref ) / f zf with roundness of the fractional factor to 1 / F
- the residual error caused by the rounding of the partial factors N Fref , N Fmain is less than 1 MHz and can be tolerated.
- fractional divider 30 would be any fractional divider
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011008350A DE102011008350A1 (de) | 2011-01-12 | 2011-01-12 | Hochfrequenzgenerator mit geringem Phasenrauschen |
PCT/EP2011/072566 WO2012095230A1 (de) | 2011-01-12 | 2011-12-13 | Hochfrequenzgenerator mit geringem phasenrauschen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2664068A1 true EP2664068A1 (de) | 2013-11-20 |
EP2664068B1 EP2664068B1 (de) | 2015-08-05 |
Family
ID=45319114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11794488.4A Active EP2664068B1 (de) | 2011-01-12 | 2011-12-13 | Hochfrequenzgenerator mit geringem phasenrauschen |
Country Status (4)
Country | Link |
---|---|
US (1) | US9543966B2 (de) |
EP (1) | EP2664068B1 (de) |
DE (1) | DE102011008350A1 (de) |
WO (1) | WO2012095230A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10598764B2 (en) * | 2017-10-30 | 2020-03-24 | Yekutiel Josefsberg | Radar target detection and imaging system for autonomous vehicles with ultra-low phase noise frequency synthesizer |
US10205457B1 (en) * | 2018-06-01 | 2019-02-12 | Yekutiel Josefsberg | RADAR target detection system for autonomous vehicles with ultra lowphase noise frequency synthesizer |
US10404261B1 (en) * | 2018-06-01 | 2019-09-03 | Yekutiel Josefsberg | Radar target detection system for autonomous vehicles with ultra low phase noise frequency synthesizer |
CN110166048A (zh) * | 2019-07-01 | 2019-08-23 | 无锡华测电子系统有限公司 | 一种新型超宽带低相噪频率源 |
CN111654284B (zh) * | 2020-07-20 | 2024-06-25 | 无锡华测电子系统有限公司 | 一种超低相噪的离散可调点频源 |
US20220043108A1 (en) * | 2020-08-09 | 2022-02-10 | Tal Lavian | Systems methods and apparatus for deep-learning multidimensional detection segmentation and classification |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1441883A1 (de) | 1963-08-13 | 1968-12-19 | Siemens Ag | Fernsteuerbarer Sender |
US4479257A (en) * | 1982-12-30 | 1984-10-23 | Yaesu Musen Co., Ltd. | Superheterodyne circuit having variable bandwidth and center frequency shift function |
GB2209442A (en) * | 1987-09-04 | 1989-05-10 | Marconi Instruments Ltd | Frequency synthesizer |
DE4105566A1 (de) | 1991-02-22 | 1992-09-03 | Rohde & Schwarz | Hochfrequenzoszillator |
US6960962B2 (en) * | 2001-01-12 | 2005-11-01 | Qualcomm Inc. | Local oscillator leakage control in direct conversion processes |
US7701299B2 (en) | 2008-06-16 | 2010-04-20 | Phase Matrix, Inc. | Low phase noise PLL synthesizer |
JP5202213B2 (ja) | 2008-09-25 | 2013-06-05 | パナソニック株式会社 | 周波数シンセサイザ及び無線送信装置 |
US7928808B2 (en) * | 2008-11-25 | 2011-04-19 | Raytheon Canada Limited | Selectable local oscillator |
-
2011
- 2011-01-12 DE DE102011008350A patent/DE102011008350A1/de not_active Withdrawn
- 2011-12-13 WO PCT/EP2011/072566 patent/WO2012095230A1/de active Application Filing
- 2011-12-13 US US13/977,694 patent/US9543966B2/en active Active
- 2011-12-13 EP EP11794488.4A patent/EP2664068B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012095230A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2664068B1 (de) | 2015-08-05 |
DE102011008350A1 (de) | 2012-07-26 |
WO2012095230A1 (de) | 2012-07-19 |
US9543966B2 (en) | 2017-01-10 |
US20130342277A1 (en) | 2013-12-26 |
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